Pusher furnace rails with plate-shaped sliding supports and sliding shoes

Abstract

The invention relates to a pusher furnace ( 1 ) for the annealing treatment of aluminum bars for instance. Rails ( 7 ) with plate-shaped sliding supports ( 8 ) are provided. Said supports cover the entire width of the rails ( 7 ) and are produced with grooves ( 12 ) on the upper sides thereof. The grooves extend in the longitudinal direction of the rails ( 7 ) in an arrow-shaped manner and serve for receiving driven material. Several sliding supports ( 8 ) are juxtaposed and thereby form arrow-shaped expansion joints. The rails ( 7 ) and the sliding supports ( 8 ) can be easier produced and assembled by virtue of the inventive embodiment of said rails ( 7 ) and sliding supports ( 8 ). Furthermore, the material ( 10 ) can be transported without jolts in as far as possible, whereby said material is mounted on sliding shoes ( 9 ).

What is claimed is:  
     
       1. Pusher furnace with rails ( 7 ) and with sliding shoes ( 9 ) which are guided displaceably on these and carry the treatment material to be transported through the furnace, sliding supports ( 8 ) which have grooves ( 12 ) for receiving material abrasion being provided on the rails ( 7 ), characterized in that the sliding supports ( 8 ) are of plate-shaped design, in each case fully cover the rails ( 7 ) over their width and are provided on their top sides with grooves ( 12 ), running in an arrow shaped manner in the longitudinal direction of the rails ( 7 ), for receiving material abrasion, and in that a plurality of sliding supports ( 8 ) are lined up with one another to form arrow-shaped joints, the cross section of the joints corresponding essentially to that of the grooves. 
     
     
       2. Pusher furnace according to  claim 1 , characterized in that the sliding supports ( 8 ) are screwed to the rails ( 7 ). 
     
     
       3. Pusher furnace according to  claim 1 , characterized in that the rails ( 7 ) and the sliding supports ( 8 ) are in each case connected to one another in one piece. 
     
     
       4. Pusher furnace according to  claim 3 , characterized in that the rails ( 7 ) and the sliding supports ( 8 ) are in each case connected to one another in one piece as a casting. 
     
     
       5. Pusher furnace according to  claim 1 , characterized in that the sliding supports ( 8 ) are made of cast steel. 
     
     
       6. Pusher furnace according to  claim 1 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       7. Pusher furnace according to  claim 2 , characterized in that the sliding supports ( 8 ) are made of cast steel. 
     
     
       8. Pusher furnace according to  claim 3 , characterized in that the sliding supports ( 8 ) are made of cast steel. 
     
     
       9. Pusher furnace according to  claim 4 , characterized in that the sliding supports ( 8 ) are made of cast steel. 
     
     
       10. Pusher furnace according to  claim 2 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       11. Pusher furnace according to  claim 3 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       12. Pusher furnace according to  claim 4 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       13. Pusher furnace according to  claim 5 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       14. Pusher furnace according to  claim 7 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       15. Pusher furnace according to  claim 8 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       16. Pusher furnace according to  claim 9 , characterized in that the tips of the arrow-shaped grooves ( 12 ) are directed towards the direction of transport. 
     
     
       17. A pusher furnace comprising 
       rails ( 7 ),  
       sliding shoes ( 9 ) which are guided displaceably on said rails to carry the treatment material to be transported through the furnace,  
       sliding supports ( 8 ) provided on said rails, said sliding supports having a plate shaped design and having grooves ( 12 ) on their top sides for receiving material abraded from the treatment material,  
       wherein said sliding supports ( 8 ) fully cover the rails ( 7 ) over their width,  
       wherein the grooves that are provided on the top sides of said sliding supports ( 8 ) extend in an arrow shaped manner in the longitudinal direction of the rails ( 7 ),  
       wherein said sliding supports ( 8 ) are lined up with one another to form arrow-shaped joints, and  
       wherein the cross section of the sliding support joints correspond essentially to the arrow shape of the sliding support grooves.  
     
     
       18. The pusher furnace claimed in  claim 17  wherein the grooves that are provided on the top sides of said sliding supports ( 8 ) have tips that are directed towards the direction of transport within the furnace. 
     
     
       19. The pusher furnace claimed in  claim 17  wherein said rails ( 7 ) and said sliding supports ( 8 ) are, in each case, connected to one another in one piece as a casting. 
     
     
       20. The pusher furnace claimed in  claim 18  wherein said rails ( 7 ) and said sliding supports ( 8 ) are, in each case, connected to one another in one piece as a casting.